Accurate carbon dating
Some believe trees are known to be as old as 9,000 years. A lot of people doubt this claim for various good reasons I wont go into here.We believe all the dates over 5,000 years are really compressible into the next 2,000 years back to creation.Half-life refers to the amount of time it takes for an object to lose exactly half of the amount of carbon (or other element) stored in it.This half-life is very constant and will continue at the same rate forever.For object over 4,000 years old the method becomes very unreliable for the following reason: Objects older then 4,000 years run into a problem in that there are few if any known artifacts to be used as the standard.Libby, the discoverer of the C14 dating method, was very disappointed with this problem.Most concerning, though, is when the carbon dating directly opposes or contradicts other estimates.At this point, the carbon dating data is simply disregarded.
Similarly, it will take another 5,730 years for the amount of carbon to drop to 25g, and so on and so forth.
This is only because it is well calibrated with objects of known age.
Example: wood found in a grave of known age by historically reliable documents is the standard for that time for the C14 content.
Specifically, there are two types of carbon found in organic materials: carbon 12 (C-12) and carbon 14 (C-14).
It is imperative to remember that the material must have been alive at one point to absorb the carbon, meaning that carbon dating of rocks or other inorganic objects is nothing more than inaccurate guesswork.